CN112907018A - Economic revenue calculation method and control center of heating system - Google Patents
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Abstract
The invention relates to the technical field of heating systems, in particular to an economic profit and income calculation method and a control center of a heating system. The invention comprises the following steps: step S110: establishing a thermal load model of the user, and step S120: calculating corresponding equipment investment cost, risk loss cost, operation and maintenance cost and equipment residual value cost, and step S130: establishing a change relation between the load of the low-voltage distribution network and the load of the heat accumulating type electric heating, calculating the heating cost according to the heat load requirement of a user, and step S140: and subtracting the heating cost, the equipment investment cost, the risk loss cost and the operation and maintenance cost to obtain the operation and maintenance cost according to the total heating sum paid by the user and the residual equipment cost. The invention can quickly establish a heat load model, can quickly calculate the profit and loss of the heating system according to the heat load model for establishment, can calculate the profit and loss amount according to the invention, and can suggest the profit and loss amount to suggest a proper number and size of heating systems in urban planning.
Description
Technical Field
The invention relates to the technical field of heating systems, in particular to an economic profit and income calculation method and a control center of a heating system.
Background
Because the cogeneration unit has obvious energy-saving potential, the cogeneration unit gradually becomes one of main heat source forms of a district heating system. The combined heat supply mode of the cogeneration unit and the peak shaving heat source is more and more widely applied to a regional heat supply system, the cogeneration unit bears basic heat load, and the peak shaving boiler bears peak heat load. The problem also follows: how to configure the load distribution of the cogeneration unit and the peak shaving boiler can optimize the economy of the heating system.
The rational distribution of heat and electricity costs has been a difficult problem to solve in cogeneration. The optimization of the cogeneration heat source configuration from the economical point of view can avoid the problem to some extent. Although different students adopt different economic optimization objective functions and different optimization algorithms, the economic optimization objective functions are different in nature, but the calculation of the total output profit of the system cannot be carried out, and profit and loss cannot be calculated when the heating system is proposed.
Disclosure of Invention
The invention provides an economic profit and calculation method and a control center of a heating system aiming at the problems in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides an economic profit and revenue calculation method of a heating system, which is applied to a control center and comprises the following steps: step S110: establishing a thermal load model of the user, and step S120: calculating corresponding equipment investment cost, risk loss cost, operation and maintenance cost and equipment residual value cost, and step S130: establishing a change relation between the load of the low-voltage distribution network and the load of the heat accumulating type electric heating, calculating the heating cost according to the heat load requirement of a user, and step S140: and subtracting the heating cost, the equipment investment cost, the risk loss cost and the operation and maintenance cost to obtain the operation and maintenance cost according to the total heating sum paid by the user and the residual equipment cost.
Preferably, the thermal load model predicts thermal load using a residential thermal load estimation formula, Q, relating to outdoor temperature and building arear.i(t)＝αF(i)K(Tn.i(t)-Twn(t))/1000, wherein: qr.i(t) is the heat load demand of the ith household at the moment t, and alpha is a building temperature difference correction coefficient and is taken as 1; k is the building heat transfer coefficient, F (i) is the building area, m2Correspondence of different types of residentsThe areas of the buildings are different; t isn.i(t) is the temperature in the heating room at the moment of ith user t, and different types of users correspond to different temperatures; t iswn(t) the heating outdoor temperature at time t; the building area F is calculated as F (i) ═ 60+ [ (100-60) × η -]In the formula: eta is a random coefficient, eta belongs to [0, 1 ]](ii) a The heat transfer coefficient K of the building is calculated by the formula
In the formula: alpha is alphanThe heat exchange coefficient of the inner surface of the enclosure structure is obtained; alpha is alphawThe heat exchange coefficient of the outer surface of the enclosure structure is obtained; delta is the thickness of each layer of material of the building envelope; lambda is the heat conductivity coefficient of each layer of material of the building envelope; alpha is alphaλThe coefficient is the coefficient of heat conductivity correction of the material; rkIs a closed space thermal resistance.
Preferably, the equipment investment cost includes a heating equipment investment cost, a heat storage equipment investment cost, a heat dissipation equipment investment cost, a civil engineering investment cost and an auxiliary service equipment investment cost, and the heating equipment investment cost Chp is calculated by the following formula: chp＝Chp·CIhp/PVA(i，nhp) In the formula: CIhp is investment cost per unit power of heating equipment, yuan/kW; nhp is the service life of the heating equipment; the heat storage equipment investment cost; the heat storage equipment investment cost Cst has the calculation formula: cst＝CIst·Vs/PVA(i，nst) In the formula: CIst is the investment cost of heat storage equipment with unit capacity, yuan/m 3; nst is the service life of the heat storage equipment; heat dissipation equipment investment cost; the calculation formula of the investment cost Cr of the heat dissipation equipment is as follows: cr＝CIr·N/PVA(i，nr) In the formula: CIr is the investment cost of heat dissipation equipment of single-chip heat radiator heat supply area, yuan/m 2; nr is the service life of the heat dissipation equipment; the civil engineering investment cost Cg is calculated by the following formula: cg＝CIg·F/PVA(i，ng) In the formula: CIg is the civil engineering investment cost per unit heating area, yuan/m 2; ng is the life of the land; the auxiliary service equipment investment cost CO calculation formula is as follows: co＝CIo·F/PVA(i，no) In the formula: CIo is the investment cost of auxiliary service equipment in unit area, yuan/m 2; no is the service life of the auxiliary service equipment; what is needed isThe calculation formula of the equipment investment cost CA is CA＝Chp+Cst+Cr+Cg+Co。
Preferably, the risk loss cost calculation formula is CL＝ηLP·F·CLPIn the formula etaLPThe probability of occurrence of a fault is the stop-warm fault; cLPThe unit area is the loss cost of the heating stop.
Preferably, the operation and maintenance cost is composed of an annual heating operation cost COL, an annual maintenance cost CM, a personnel management cost CH, and a heat supply network loss cost CNL, and the annual heating operation cost calculation formula is as follows: cOL＝Php·Ton·Cp·DhIn the formula: cp is the valley price of the peak-valley prices; dh is the number of heating days in a heating season; the calculation formula of the annual maintenance cost is CM＝λM·CAIn the formula: lambda [ alpha ]MFor equipment maintenance rate, calculated herein as 1%; the formula for calculating the personnel management cost is as follows: cH＝CPHF; in the formula: CPH is the wage of the staff, and 5 yuan/m 2 is taken in the text; the calculation formula of the loss cost of the heat supply network is as follows: cNL＝ηNL·COL(ii) a In the formula: etaNLThe heat supply network pipeline loss rate; the operation and maintenance cost CAM is as follows: cAM＝COL+CM+CH+CNL。
Preferably, the calculation formula of the device residual cost is as follows:
in the formula:
the residual rate is obtained.
Preferably, the heating cost calculation formula is
In the formula: c is the running cost; c is the real-time electricity price in the time period t; t is a scheduling period; Δ t is a unit scheduling time.
The invention also discloses a computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method.
The invention also discloses a control center, which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the steps of the method are realized when the processor executes the program.
The invention has the beneficial effects that:
the economic profit and loss calculation method and the control center of the heating system can quickly establish the heat load model, can quickly calculate the profit and loss of the heating system according to the heat load model for establishment, can calculate the profit and loss amount according to the economic profit and loss calculation method and the control center of the heating system, and can suggest the profit and loss amount to suggest a proper number and size of heating systems in urban planning.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the specification. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic diagram illustrating a method for calculating economic profit for a heating system according to an embodiment of the present disclosure.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The present invention is described in detail below with reference to the attached drawings.
The invention provides an economic profit and revenue calculation method of a heating system, which is applied to a control center and comprises the following steps: step S110: establishing a thermal load model of the user, and step S120: calculating corresponding equipment investment cost, risk loss cost, operation and maintenance cost and equipment residual value cost, and step S130: establishing a change relation between the load of the low-voltage distribution network and the load of the heat accumulating type electric heating, calculating the heating cost according to the heat load requirement of a user, and step S140: according to the method, a heat load model can be quickly established, the profit and loss of the heating system can be quickly calculated according to the established heat load model, and the profit and loss amount can be calculated according to the method.
In this embodiment, the thermal load model uses a residential thermal load estimation formula relating to outdoor temperature and building area to perform thermal load prediction, Qr.i(t)＝αF(i)K(Tn.i(t)-Twn(t))/1000, wherein: qr.i(t) is the heat load demand of the ith household at the moment t, and alpha is a building temperature difference correction coefficient and is taken as 1; k is the building heat transfer coefficient, F (i) is the building area, m2The areas of the buildings corresponding to different types of residents are different; t isn，i(t) is the temperature in the heating room at the moment of ith user t, and different types of users correspond to different temperatures; t iswn(t) the heating outdoor temperature at time t; the building area F is calculated as F (i) ═ 60+ [ (100-60) × η -]In the formula: eta is a random coefficient, eta belongs to [0, 1 ]](ii) a The heat transfer coefficient K of the building is calculated by the formula
In the formula: alpha is alphanThe heat exchange coefficient of the inner surface of the enclosure structure is obtained; alpha is alphawThe heat exchange coefficient of the outer surface of the enclosure structure is obtained; delta is the thickness of each layer of material of the building envelope; lambda is the heat conductivity coefficient of each layer of material of the building envelope; alpha is alphaλThe coefficient is the coefficient of heat conductivity correction of the material; rkIs a closed space thermal resistance.
In this embodiment, the equipment investment cost includes a heating equipment investment cost, a heat storage equipment investment cost, a heat dissipation equipment investment cost, a civil engineering investment cost, and an auxiliary service equipment investment cost, and the heating equipment investment cost Chp has a calculation formula as follows: chp＝Php·CIhp/PVA(i，nhp) In the formula: investment cost of CIhp for unit power of heating equipmentYuan/kW; nhp is the service life of the heating equipment; the heat storage equipment investment cost; the heat storage equipment investment cost Cst has the calculation formula: cst＝CIst·Vs/PVA(i，nst) In the formula: CIst is the investment cost of heat storage equipment with unit capacity, yuan/m 3; nst is the service life of the heat storage equipment; heat dissipation equipment investment cost; the calculation formula of the investment cost Cr of the heat dissipation equipment is as follows: cr＝CIr·N/PVA(i，nr) In the formula: CIr is the investment cost of heat dissipation equipment of single-chip heat radiator heat supply area, yuan/m 2; nr is the service life of the heat dissipation equipment; the civil engineering investment cost Cg is calculated by the following formula: cg＝CIg·F/PVA(i，ng) In the formula: CIg is the civil engineering investment cost per unit heating area, yuan/m 2; ng is the life of the land; the auxiliary service equipment investment cost CO calculation formula is as follows: co＝CIo·F/PVA(i，no) In the formula: CIo is the investment cost of auxiliary service equipment in unit area, yuan/m 2; no is the service life of the auxiliary service equipment; the calculation formula of the equipment investment cost CA is CA＝Chp+Cst+Cr+Cg+Co。
In this embodiment, the risk loss cost calculation formula is CL＝ηLP·F·CLPIn the formula etaLPThe probability of occurrence of a fault is the stop-warm fault; cLPThe unit area is the loss cost of the heating stop.
In this embodiment, the operation and maintenance cost includes an annual heating operation cost COL, an annual maintenance cost CM, a personnel management cost CH, and a heat supply network loss cost CNL, and the annual heating operation cost calculation formula is: cOL＝Php·Ton·Cp·DhIn the formula: cp is the valley price of the peak-valley prices; dh is the number of heating days in a heating season; the calculation formula of the annual maintenance cost is CM＝λM·CAIn the formula: lambda [ alpha ]MFor equipment maintenance rate, calculated herein as 1%; the formula for calculating the personnel management cost is as follows: cH＝CPHF; in the formula: CPH is the wage of the staff, and 5 yuan/m 2 is taken in the text; the calculation formula of the loss cost of the heat supply network is as follows: cNL＝ηNL·COL(ii) a In the formula: etaNLThe heat supply network pipeline loss rate; the operation and maintenance cost CAM is as follows: cAM＝COL+CM+CH+CNL。
In this embodiment, the calculation formula of the device residual cost is:
in the formula:
the residual rate is obtained.
In this embodiment, the heating cost calculation formula is
In the formula: c is the running cost; c is the real-time electricity price in the time period t; t is a scheduling period; Δ t is a unit scheduling time.
The algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. Moreover, this description is not intended for any particular programming language. It will be appreciated that a variety of programming languages may be used to implement the teachings of the present specification and that specific languages are described above to disclose the best modes of the specification.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the present description may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the specification, various features of the specification are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that is, the present specification as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this specification.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the description and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
The various component embodiments of this description may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functionality of some or all of the components of a gateway, proxy server, system in accordance with embodiments of the present description. The present description may also be embodied as an apparatus or device program (e.g., computer program and computer program product) for performing a portion or all of the methods described herein. Such programs implementing the description may be stored on a computer-readable medium or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the specification, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The description may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
Although the present invention has been described with reference to the above preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A heating system economic profit calculation method is characterized in that: applied to a control center, the method comprises the following steps: step S110: establishing a thermal load model of the user, and step S120: calculating corresponding equipment investment cost, risk loss cost, operation and maintenance cost and equipment residual value cost, and step S130: calculating the heating cost according to the heat load requirement of the user, and step S140: and subtracting the heating cost, the equipment investment cost, the risk loss cost and the operation and maintenance cost to obtain the operation and maintenance cost according to the total heating sum paid by the user and the residual equipment cost.
2. The economic profit calculation method of a heating system according to claim 1, wherein: the thermal load model uses a residential thermal load estimation formula related to outdoor temperature and building area to perform thermal load prediction, Qr.i(t)＝aF(i)K(Tn.i(t)-Twn(t))/1000, wherein: qr.i(t) is the heat load demand of the ith household at the moment t, and alpha is a building temperature difference correction coefficient and is taken as 1; k is the building heat transfer coefficient, F (i) is the building area, m2The areas of the buildings corresponding to different types of residents are different; t isn.i(t) is the temperature in the heating room at the moment of ith user t, and different types of users correspond to different temperatures; t iswn(t) the heating outdoor temperature at time t; the building area F is calculated as F (i) ═ 60+ [ (100-60) × η -]In the formula: eta is a random coefficient, eta belongs to [0, 1 ]](ii) a The heat transfer coefficient K of the building is calculated by the formula
In the formula: alpha is alphanThe heat exchange coefficient of the inner surface of the enclosure structure is obtained; alpha is alphawThe heat exchange coefficient of the outer surface of the enclosure structure is obtained; delta is the thickness of each layer of material of the building envelope; lambda is the heat conductivity coefficient of each layer of material of the building envelope; alpha is alphaλThe coefficient is the coefficient of heat conductivity correction of the material; rkIs a closed space thermal resistance.
3. The economic profit and calculation method according to claim 1 for a heating systemThe method is characterized in that: the equipment investment cost comprises heating equipment investment cost, heat storage equipment investment cost, heat dissipation equipment investment cost, civil engineering investment cost and auxiliary service equipment investment cost, and the heating equipment investment cost Chp has the calculation formula as follows: chp＝Php·CIhp/PVA(i，nhp) In the formula: CIhp is investment cost per unit power of heating equipment, yuan/kW; nhp is the service life of the heating equipment; the heat storage equipment investment cost; the heat storage equipment investment cost Cst has the calculation formula: cst＝CIst·Vs/PVA(i，nst) In the formula: CIst is the investment cost of heat storage equipment with unit capacity, yuan/m 3; nst is the service life of the heat storage equipment; heat dissipation equipment investment cost; the calculation formula of the investment cost Cr of the heat dissipation equipment is as follows: cr＝CIr·N/PVA(i，nr) In the formula: CIr is the investment cost of heat dissipation equipment of single-chip heat radiator heat supply area, yuan/m 2; nr is the service life of the heat dissipation equipment; the civil engineering investment cost Cg is calculated by the following formula: cg＝CIg·F/PVA(i，ng) In the formula: CIg is the civil engineering investment cost per unit heating area, yuan/m 2; ng is the life of the land; the auxiliary service equipment investment cost CO calculation formula is as follows: co＝CIo·F/PVA(i，no) In the formula: CIo is the investment cost of auxiliary service equipment in unit area, yuan/m 2; no is the service life of the auxiliary service equipment; the calculation formula of the equipment investment cost CA is CA＝Chp+Cst+Cr+Cg+Co。
4. The economic profit calculation method of a heating system according to claim 1, wherein: the risk loss cost calculation formula is CL＝ηLPF·CLPIn the formula: etaLPThe probability of occurrence of a fault is the stop-warm fault; cLPThe unit area is the loss cost of the heating stop.
5. The economic profit calculation method of a heating system according to claim 1, wherein: the operation and maintenance cost is composed of annual heating operation cost COL and annual maintenance cost CMPersonnel management cost CH and heat supply network loss cost CNL, the annual heating operation cost calculation formula is as follows: cOL＝Php·Ton·Cp·DhIn the formula: cp is the valley price of the peak-valley prices; dh is the number of heating days in a heating season; the calculation formula of the annual maintenance cost is CM＝λM·CAIn the formula: lambda [ alpha ]MFor equipment maintenance rate, calculated herein as 1%; the formula for calculating the personnel management cost is as follows: cH＝CPHF; in the formula: CPH is the wage of the staff, and 5 yuan/m 2 is taken in the text; the calculation formula of the loss cost of the heat supply network is as follows: cNL＝ηNL·COL(ii) a In the formula: etaNLThe heat supply network pipeline loss rate; the operation and maintenance cost CAM is as follows: cAM＝COL+CM+CH+CNL。
6. The economic profit calculation method of a heating system according to claim 1, wherein: the calculation formula of the equipment residual value cost is as follows:
in the formula:
the residual rate is obtained.
7. The economic profit calculation method of a heating system according to claim 1, wherein: the heating cost calculation formula is
In the formula: c is the running cost; c is the real-time electricity price in the time period t; t is a scheduling period; Δ t is a unit scheduling time.
8. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 7.
9. A control center comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the steps of the method of any one of claims 1 to 7 are implemented when the program is executed by the processor.
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| CN111457463A (en) * | 2020-03-03 | 2020-07-28 | 天津大学 | Heat accumulating type electric heating optimization control method without power failure and power outage |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111457463A (en) * | 2020-03-03 | 2020-07-28 | 天津大学 | Heat accumulating type electric heating optimization control method without power failure and power outage |
Non-Patent Citations (2)
| Title |
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| 张嘉睿等: "基于全寿命周期等年值成本的蓄热式电取暖方案经济性评估", 电力需求侧管理, vol. 22, no. 3, 31 May 2020 (2020-05-31) * |
| 张嘉睿等: "考虑停电时段用户热需求的蓄热式电采暖日前优化调度方法", 电力系统自动化, vol. 44, no. 21, 10 November 2020 (2020-11-10) * |
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